<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>css 引入方式</title>
    <!-- link 引入外部样式表 ：rel：关系，样式表 -->
    <link rel="stylesheet" href="./my.css">
</head>
<body>
  <p>这是p标签</p>
  <!-- 行内，style="css 属性" -->
  <div style="color: yellow; font-size: 100px;">这是div标签</div>  
</body>
</html>